Question: Independent random samples are selected from two populations. The data are shown in the following table. Sample 1 Sample 2 15 16 5 9 5

Independent random samples are selected from two populations.

The data are shown in the following table.

Sample 1 Sample 2 15 16 5 9 5 10 13 12 8 10 12 8 9 4

a. Use the Wilcoxon rank sum test to determine whether the data provide sufficient evidence to indicate a shift in the locations of the probability distributions of the sampled populations. Test, using a = .05.

b. Do the data provide sufficient evidence to indicate that the probability distribution for population 1 is shifted to the right of the probability distribution for population 2?

Use the Wilcoxon rank sum test with a = .05.

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